Fire-alarm system.



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(No Model.)

No. 68u27. Patented Aug. 2o, mol. c. E. LOMBARD.

' FIRE ALARM SYSTEM.'

` (Application ledMar. 14, 1901.) Y (No Model.) 2 ShQets-Sheet 2. y

WITNESSES.- El oid NTEDV STATES;

PATENT OFFICE.

CHARLES E. LOMBARD, OF EAST WILTON, MAINE, ASSIGNOR OF ONE- HALF TO JAMES WALKER, OE SAME PLACE.

FIRE-*ALARM SYSTEM.

SPECIFICATION forming part of Letters llPatent No.` 681,127, dated August 20, 190i. Application filed March 14,1901. Serial No. 51,164- (NO mOdcL) T all whom Il may concern.-

` marked thereon, which form a part of this specilication. i

This invention relates to new and useful improvements in automatic fire-alarms; and it consists in the provision of means whereby when the temperature of a room becomes above a certain degree a sounding-alarm will be actuated and an electrical switch thrown to close a circuit, whereby an annunciator may indicate the location of the iire or cause an electric signal to be operated at any desired location.

More specifically the invention consists of a tire-alarm system in which a series of wires having communication with the alarm-actuating apparatus are connected together with fusible unions, whichunder a high temperature melt and allow the actuating mechanism to give the alarm.

Theinvention will be hereinafter more fully described and then specifically defined in the appended claims and is illustrated in the accom panying drawings, which, with the letters of reference marked thereon, form a part of this application, and in which drawings similar letters of reference indicate like parts throughout the several views, in Which- Figure l is a sectional perspective View showing a room equipped with the improved system of fire-alarm. Fig. 2 is a side elevation of the alarm-actuating apparatus. Fig. 8 is a detail view of one of the bar-actuating levers. Fig. 4 is a detail view showing the clamping members. Fig. 5 is a detail view of lugs A at different locations and is held to the ceiling of a room by means of staples B. Pivoted on pins C are the angle-levers C, one

end of each lever being slotted to receive one of said lugs. A spring D is secured to each lever at one end and at its other end is fastened to the ceiling.

E E designate sections of wire which have their ends interlocked in the manner shown H is a lever pivoted at H2 to the plate F,

said lever H serving as a clamp to hold the cable G against the stationary block J.

K is a link which connects the lever H with the end of the clamping-lever H and forms Pivoted at one end of said plate f fr with said lever H a toggle-joint between the pivotal points L and L. Said cable G has a stop G' thereon and is connected at its upper end to one end of the spring M, which latter is fastened to any stationary object. At any suitable location is a frame N, in which is` journaled a shaft N', on which is mounted a drum, to which a ratchet-wheel N3 is secured, the latter being provided with ratchet-teeth n about i'ts periphery. Mounted in an aperture in the ratchet-wheel is a pin N4, which as the ratchet-wheel rotates is designed to strike against and tilt the lever N5. This lever N5 is connected by means of a wire N6 with a switch-arm N7, which may be connected to an electric apparatus for closing a circuit (not shown) for the purpose of giving an alarm at any desired location.

A bell O is mounted on the supports O/ and has a crank-arm O2, to which one end of the rod O3 is connected, which latter in turn is pivoted, the other end of rod O3 being pivoted 95 to the upper end of the pitman O4, which passes through an aperture in the ceiling. The lower end of pitman O4 is pivoted to a pin carried by a disk N2, mounted on the end of the drum-carrying shaft, whereby as Said IOO disk rotates the pitman willcause the rod O3 to reciprocate and ring the bell. Winding about said drum is a rope R, which passes over a pulley R and has a weight R2 secured to its end. A pawl S is pivoted to the frame N, one end of said pawl being disposed in engagement with the teeth of the ratchet-Wheel and the other end of the pawl in the path vof the stop G on the cable G, 'so that when the spring M causes the cable G to be drawn up the ypawl will be tilted and the drum be allowed to rotate under the influence of the weighted rope, which unwinds from the drum.-

In operation when the temperature in a room rises to a danger-point sufficiently to melt the unions which connect the Wires E the latte-r will be disconnected and the bar A, under the influence of the springs connected thereto, will be drawn longitudinally and the cable I will be drawn with the bar, and the lever H being tilted will cause the clamping end of the lever H to be released from the cable G, and the spring M Will draw up said cable G,-and as the stop G contacts with the end of the lever or pawl St-he latter will be' drawn away from the ratchet-teeth of the wheel N8, allowingthe Weight R2 to rotat'ethe drum by means of the rope unwinding from saidv drum. As the'drum rotates the bell'will be rung through its connection with the' pitman and rod O3, and as said pin comes in contact with the end'of the lever N5 theslW-iltch N 7 Will be throw-n for .the purpose of closing a circuit, the poles of which circuit are designated by letter N10 in Fig. 1.

What I claim is- 1. Anlautomatic fire-alarm, consisting-of a longitudinally-movable bar held to thev ceiling of aroom, spring-actuated levers enga-ging said' bar, Wires with fusible 'connections designed to hold said levers normally under tension, aspring-actuated cable, and signaloperating mechanism actuated thereby, a iifxedclamping-block and a pivot'ed-y clamping-jaw, and connections between the latter and said spring-actuated bar for holding said `tions with said lever, and movable clamping- 'jaw, and cable connections between said spring-actuated bar and lever, as set forth.

3. In combination With the spring-actuated cable, the clamping-jaws and means for holding the same normally under tension of its springs, a drum, a weighted rope Windingy .about the latter, a ratchet-Wheel rotating with said drum, a pivoted pawl engaging at one end the teethof said ratchet-wheehits other end apertured to receive said cable, a stop on the cable adapted to contact with the apertured `end of said pawltoti'lt the same, and alarmoperating mechanism which is actuatedA as the drum rotates, asset forth.

4. In combination withfth'e spring-actuated cable, and meansfor holding the same under tension of its spring, and for releasing same, a drum, a weighted rope Winding about the latter, a ratchet-Wheel rotating with' said drum, a pivoted pawl, one end of Which engages the'teethof said ratchet-Wheel, its other end apertured to receive'said cable, a knot ,Onthe cable designed' to trip against said pawl, aseries of pins held to the face of said ratchet-wheel, a pivoted lever, one end of Whichisdisposed in the path of said pins, and a circuit-closer actuated by said lever as it tilts upon its pivot, as set forth.

In testimony' whereof I hereunto affix my signature i-nvpresence of two Witnesses.

CHARLES E. LOMBARD; Witnesses:

' JAMES WALKER,

THOMAS J. WALKER. 

